On my Surface Book, when Office365 installs, it notices and adds functionality for the Surface Pen. It's quite impressive out of the box. I can draw on top of spreadsheets, and then click into cells. Writing formulas is awkward, so it makes sense to switch to the keyboard at that point.

My hope is you would see similar features on the iPad Pro. I know for a fact that stylus enhancements are available and built in.

A stylus and handwriting recognition doesn't work all that reliably, IMO. As part of my job I'm often outside entering data into excel and I've tried many times. The problem is that the recognition, as good as it is, just isn't quite precise enough when spaces, commas, periods, all matter immensely. I use a stylus in bad weather, but just to tap the keys on the on-screen keyboard while wearing gloves.

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